A three-colour ratio and removal

A three-colour ratio and removal

Secondary 2
TGM Original Questions

A bag contains 98 red, blue and green marbles in the ratio \(3:5:x\). The probability of green exceeds the probability of red by \(3/14\).

  1. Find \(x\).
  2. Seven blue marbles are removed. Find the probability that the next marble is blue.

Solution:

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Answer:(a) \(x=6\); (b) \(4/13\).

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